Xiaolei Wang
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Xiaolei Wang has a total of 2 co-authors. Here are the top co-authors by number of shared publications:
- Qinghui Li
College of Meteorology and Oceanography National University of Defense Technology Changsha China
2 shared publications - Xuejin Sun
College of Meteorology and Oceanography, National University of Defense Technology, Changsha 410073, China
2 shared publications
Latest Publications
- Open Access
- 26 September 2021
- Published by MDPI AG in Remote Sensing
- Vol. 13 (19) , 3851
Reliability Evaluation of the Joint Observation of Cloud Top Height by FY-4A and HIMAWARI-8
It is well known that the measurement of cloud top height (CTH) is important, and a geostationary satellite is an important measurement method. However, it is difficult for a single geostationary satellite to observe the global CTH, so joint observation by multiple satellites is imperative. We used both active and passive sensors to evaluate the reliability of joint observation of geostationary satellites, which includes consistency and accuracy. We analyzed the error of CTH of FY-4A and HIMAWARI-8 and the consistency between the two satellites and conducted research on the problem of missing measurement (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) has CTH data, but FY-4A/HIMAWARI-8 does not) of the two satellites. The results show that FY-4A and HIMAWARI-8 have good consistency and can be jointly observed, but the measurement of CTH of FY-4A and HIMAWARI-8 has large errors, and the error of FY-4A is greater than that of HIMAWIRI-8. The error of CTH is affected by the CTH, cloud optical thickness (COT) and cloud type, and the consistency between the two satellites is mainly affected by the cloud type. FY-4A and HIMAWARI-8 have the problem of missing measurement. The missing rate of HIMAWARI-8 is greater than that of FY-4A, and the missing rate is not affected by the CTH, COT and surface type. Therefore, although FY-4A and HIMAWARI-8 have good consistency, the error of CTH and the problem of missing measurement still limit the reliability of their joint observation.
- 26 September 2021
- Published by MDPI AG in Remote Sensing
- Vol. 13 (19) , 3851
Open AccessReliability Evaluation of the Joint Observation of Cloud Top Height by FY-4A and HIMAWARI-8
It is well known that the measurement of cloud top height (CTH) is important, and a geostationary satellite is an important measurement method. However, it is difficult for a single geostationary satellite to observe the global CTH, so joint observation by multiple satellites is imperative. We used both active and passive sensors to evaluate the reliability of joint observation of geostationary satellites, which includes consistency and accuracy. We analyzed the error of CTH of FY-4A and HIMAWARI-8 and the consistency between the two satellites and conducted research on the problem of missing measurement (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) has CTH data, but FY-4A/HIMAWARI-8 does not) of the two satellites. The results show that FY-4A and HIMAWARI-8 have good consistency and can be jointly observed, but the measurement of CTH of FY-4A and HIMAWARI-8 has large errors, and the error of FY-4A is greater than that of HIMAWIRI-8. The error of CTH is affected by the CTH, cloud optical thickness (COT) and cloud type, and the consistency between the two satellites is mainly affected by the cloud type. FY-4A and HIMAWARI-8 have the problem of missing measurement. The missing rate of HIMAWARI-8 is greater than that of FY-4A, and the missing rate is not affected by the CTH, COT and surface type. Therefore, although FY-4A and HIMAWARI-8 have good consistency, the error of CTH and the problem of missing measurement still limit the reliability of their joint observation.
- Open Access
- 27 April 2021
- Published by MDPI AG in Remote Sensing
- Vol. 13 (9) , 1681
Cloud Phase Recognition Based on Oxygen A Band and CO2 1.6 µm Band
The accurate recognition of the cloud phase has a great influence on the retrieval of the cloud top height. In order to improve the accuracy of obtaining the cloud top height with OCO-2, we proposed a cloud phase recognition algorithm based on the threshold of parameter ; is defined as the reflectivity ratio of the region with weak continuous absorption of the oxygen A band to the region with weak continuous absorption of the CO2 1.6 µm band. The under different solar zenith angles and different ground albedos was calculated. The results show the following: under the same surface albedo and solar zenith angle, was large for ice clouds and small for water clouds. Under the same surface albedo, the greater the solar zenith angle, the smaller the of the ice cloud, and the larger the of the water cloud. Under the same solar zenith angle, the greater the surface albedo, the smaller the ; when the solar zenith angle was less than 70°, can be used to effectively distinguish between the ice cloud and water cloud. This study used OCO-2 data of a single orbit over ocean to verify the feasibility of the algorithm through comparison with the CALIOP cloud phase product, which provided a basis for OCO-2 cloud top height estimation.- 27 April 2021
- Published by MDPI AG in Remote Sensing
- Vol. 13 (9) , 1681
Open AccessCloud Phase Recognition Based on Oxygen A Band and CO2 1.6 µm Band
The accurate recognition of the cloud phase has a great influence on the retrieval of the cloud top height. In order to improve the accuracy of obtaining the cloud top height with OCO-2, we proposed a cloud phase recognition algorithm based on the threshold of parameter ; is defined as the reflectivity ratio of the region with weak continuous absorption of the oxygen A band to the region with weak continuous absorption of the CO2 1.6 µm band. The under different solar zenith angles and different ground albedos was calculated. The results show the following: under the same surface albedo and solar zenith angle, was large for ice clouds and small for water clouds. Under the same surface albedo, the greater the solar zenith angle, the smaller the of the ice cloud, and the larger the of the water cloud. Under the same solar zenith angle, the greater the surface albedo, the smaller the ; when the solar zenith angle was less than 70°, can be used to effectively distinguish between the ice cloud and water cloud. This study used OCO-2 data of a single orbit over ocean to verify the feasibility of the algorithm through comparison with the CALIOP cloud phase product, which provided a basis for OCO-2 cloud top height estimation.